FROM NOETH AMERICA, WALES, AND IRELAND. 6 



List of some new or not tueU-Jcnown Palceozoic Osiracoda from 

 North America and elsewhere. 



I. Primitia. Genus ranging- from the Cambrian to the Carboniferous. 



1. P. mundula^ Jones, var. cambrica, nov. PI. IV. fig. 7. 



Lower Sihirian. Wales. 



2. P. humilis, J. & H., var. humilior, nov. PL lY. fig. 5. 



Lower Silurian. Wales. 



3. P. seminulam, Jones. PI. 11. fig. 2. Harailto-n group. 



New- York State. — Upper Silurian. Europe. 



4. P. i¥or//rni{, sp. nov. PL IV. fig. (^. Lower Silurian. Wales. 



5. P. Ulrichi, sp. nov. PL IV. tigs. 1, 2, 3. Lower Silurian. 



Canada. 



6. P. unicornis (Ulrich). PL IV. figs. 8-13. Lower Silurian. 



Wales, Cincinnati. 



7. P. minuta (Eichwald). PL III. figs. 18, 19, 21-23. Lower 



Silurian. Cincinnati. — Upper Silurian. Russia. 



8. P. Whitfieldi, sp. nov. PL III. fig. 24. Lower Silurian. 



Cincinnati. 



II. Primitiopsis. Known also in the Upper Silurian of Scandinavia. 



1, P. punctidifera (Hall). PL II. figs. 7, 12, 13. Hamilton 

 Group. New- York State. 



III. Entomis. Known in the Upper Silurian, Devonian, and Carbo- 



niferous. 

 1. E. rhomhoidea^ sp. nov. PL II. figs. 9, 10. Hamilton Group. 

 New- York State. 



IV. Strepula. In the Lower and Upper Silurian of Britain and 



Scandinavia. 

 1. L. sigmoidalis, sp. nov. PL II. fig. 4. Hamilton Group. 

 New- York State. 



V. ^CHMiNA. In the Upper Silurian of Britain and Scandinavia. 



1. JS. spinosa (Hall). PL III. figs. 4-8. Upper Silurian. 



New-York State. 



2. ^. Byrnesi (MiUer). PL III. figs. 9-11. Lower Silurian. 



Cincinnati. 



VI. Bollia. a Lower- and Upper-Silurian Genus. 



1. B. symmetrica (Hall). Upper Silurian. New- York State. 



2. B. lata (Vanuxem & Hall). PL III. figs. 1-3. Upper 



Silurian. New- York State. 



VII. Kl(edenia. An Upper- Silurian Genus. 



1. Kl. notata (Hall). PL IV. figs. 22, 23. Upper Silurian. 



New-York State. 

 1*. Kl. notata, var. ventricosa (Hall). PL I. fig. 1 ; PL IV. 



fig. 24. Upper Silurian. New- York State. 



b2 



